I think the mixed-market system describe american economic system the most.
the mixed market have both the free-market and socialist market characteristic
It's true that in early U.S history, the american economic system is closer to the free-market,
But as the united states developed, it's improtant for our government to be involved in some part of economic affairs in order to obtain some social aims
Politicians must consider financial stability with all of their actions. The dependence of finance results in higher competition and more slander or unauthorized/unapproved actions as to pass whatever political views earn them the most money. A weaker economy means a more rigorous and harmful politician.
The natural grassland ecosystem is known for its relatively high net primary productivity and high trophic efficiencies compare to other types of ecosystem, many reasons are responsible for this and three of them are listed below:
1. Natural grassland are regionally adapted to survive environmental fluctuations and grazing pressure.
2. The diverse producer base of the natural grassland ecosystem results in a large number of trophic connections. This enhances energy transfer and reduces energy losses.
3. Nutrient cycling in the natural grassland ecosystem is very efficient and this contributes to the overall efficiency of the ecosystem. The recyclers in the ecosystem decompose dead organic matters and release the energy trapped inside them.
